Improvement in combined blind-openers and slat-regulators



UNITED STATES PATENT OFFICE.

ADIN BALL, OF MILFOR-D, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND CHARLES P. NELSON, 0F SAME PLACE.

IMPROVEMENT IN COMBINED BLIND-OPENERS AND SLAT-REGULATORS.

Specification forming part of Letters Patent No. 135,063, dated January 21, 1873.

To all whom it may concern:

Be it known that I, ADIN BALL, of Milford, in the county of Worcester and State of Massachusetts, have invented a new and useful Improvement in IVindow-Blind Fixtures, of which the following is a speciiication:

Figure l represents my improved xtures attached to a window-blind, the blind being shown as fullyr open. Fig. 2 is a horizontal section of the same taken through the line wx, Fig. 1. Fig. 3 is a detail View of the scrollwheel. Fig. 4 is a detail section of the scrollwheel taken through the line y y, Fig. 3.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish improved fixtures for window-blinds which shall be so constructed that the blind may be opened and closed to any desired extent without raising the sash, which will hold the blind securely in any position into which it may be adjusted, which will close the slats automatically when the blind is closed, and which shall be simple in construction and convenient in use. The invention consists in, the combination of a lever and spring with the scrollwheel, segmental wheel, crank-shaft, and the Slat-rodA of the blind, as hereinafter fully described.

A represents the window-frame, and B the blind, about the construction of which parts there is nothing new. C is a shaft, upon the inner end of which is formed a crank, as shown in Fig. 2. The shaft C passes through a hole in the frame or casing A, and has a scroll-Wheel, D, attached to its outer end,

- which wheel is placed in a recess in the casing or frame A, and may be surrounded with a ,metallic box or casing, if desired. Upon the outer side of the wheel D are formed four scroll or cam ilanges or teeth, d', as shown in Figs. 3 and 4. The scrolls d are laid out by dividing each of two diameters that cross each other at right angles into three equal parts, and striking the scrolls from these points of division as centers. The wheel D is covered by a plate, E, which is slotted horizontally to receive the segmental wheel F, which is attached to the blind B, and which has a socket formed in it to receive the hingehook G, and thus form the lower hinge for the blind. The teeth of the segmental wheel F are so formed as to receive the scrolls d, the ends of said scrolls overlapping each other so much that the following scroll of the wheel D may always take hold of the teeth of the segmental wheel F before the preceding scroll releases said teeth, so that the blind may always be securely held. b1 are the slats of the blind B, which are connected by staples with a rod, b2, in the ordinary manner. With the lower end of the rod b2 is connected the outer end of a lever, H, which is pivoted to the lower part of the blind B.

The inner end of the lever H projects beneath the last tooth of the segmental wheel F, so that the forward end of a scroll, d', may strike the said inner end of the lever H as the blind closes, and thus close the slats of said v 

